Thus, we decide to use Rhodium-plated on stainless steel. With 24K gold plated spring to achieve good output.

・Insulation material at the bottom of 510:

Use Polyether ether ketone (PEEK) . It melts around 334 °C (662 °F). Some grades have a useful operating temperature of up to 250 °C (482 °F). Greatly reduce the risk of hot melt which caused by short circuit.